The JBL Tune Flex makes your day better, song by song. These completely wireless earbuds offer you 32 hours of exceptional JBL Pure Bass sound, while the ergonomic and waterproof design ensures comfort all day long, regardless of the weather. With a simple touch, you can make calls anywhere without background noise. With active noise-cancelling and Smart Ambient technology, you can choose whether to block out the outside world or engage with your surroundings. The lightweight stick-open design provides comfort and natural sound perception throughout the day. You can personalize your entire listening experience with the JBL Headphones app. Stay connected to your world, your way. JBL Pure Bass Sound. Thoughtfully designed 12mm speaker drivers, further supported by the stick form factor, deliver JBL's Pure Bass sound, allowing you to feel every pulsating beat. Active Noise-Cancelling with Smart Ambient. Hear more of what you want to hear while blocking out other distractions. With active noise-cancelling technology featuring two microphones, you can minimize acoustic distractions. Ambient Aware lets you stay aware of your surroundings at all times, making you feel safer when you're out and about, while TalkThru allows you to take a quick break for a conversation without having to remove the earbuds. Four microphones for perfect calls. Enjoy hassle-free stereo hands-free calling. The Tune Flex is equipped with four microphones, ensuring that the person on the other end hears you perfectly. It's enjoyable to answer or return a call. And with VoiceAware, you can control how loud you want to hear yourself by adjusting how much of the microphone input is fed back to the earbuds.